Seismic behavior study on a space double-layer lattice structure with a lower supporting structure

Abstract

Severe damage, such as support failure, global buckling of members, local buckling of members, fracture of members, dislocation at the end of members, and failure of bolted connections, were observed in space double-layer lattice structures following the Lushan earthquake (China, 2013, M 7.0). To study the seismic behavior of the space double-layer lattice structure with a lower supporting structure, a series of shaking table tests were conducted. A nonlinear numerical analysis was performed on the damage of the structure, in which the material parameters were obtained from material tests of the steel member. The numerical results were compared with the experimental results, and the difference between the test and the numerical simulation was presented and discussed. The validity and accuracy of the proposed numerical model used for predicting the structural damage was verified by the experimental results, which indicates that the modeling and analytical method was applicable for the analysis of the space double-layer lattice structure.

Numerical simulation of large-scale structural systems

“…The frequent use of single-and double-layer lattice space structures specially in the seismic prone area reveals the importance of the dynamic studies on these shell-type structures. In an article by Nie et al, 4 ''Seismic behavior study on a space double-layer lattice structure with a lower supporting structure,'' the authors carried out a series of shaking table experiments on lattice structures. Subsequently, a nonlinear finite element model is also developed using parameters calibrated based on material testing of the steel members.…”

“…The accepted papers cover a wide range of structural engineering-related issues. In a very broad classification, one may identify five major categories: (1) modal analysis and vibration characteristics, (2) seismic response of large special infrastructures, (3) fundamental theories in discretized numerical methods, (4) thermal analysis and heat transfer, and (5) dynamic effects of trains and tunnels. Figure 2 provides a big picture and presents an overall summary of all the theoretical, numerical, and case studies used in one of the 15 accepted papers.…”

Seismic behavior of steel space truss connections to reinforced concrete supporting columns

“…With the low weight and great stiffness, space trusses are believed to attract low forces during seismic activities and can be considered to be amongst the least likely structure to suffer damage (Hanaor, 2011;Marsh, 2000). Many researchers have studied the seismic performance of space truss structures under severe earthquakes based on dynamic analysis (Arjang, 2004;Nie et al, 2014a;Yang et al, 2011;Zhi et al, 2012) and shaking table tests (Nie et al, 2014b(Nie et al, , 2018Zhang et al, 2016).…”